usefull

#remove exited containers
docker ps -a | grep Exit | cut -d ' ' -f 1 | xargs docker rm

# Delete all containers
docker rm $(docker ps -a -q)
# Delete all images
docker rmi $(docker images -q)

#nginx
docker run -ti --rm -d --name nginx -p 81:80 nginx /bin/sh -c 'while true; do echo hello; sleep 10;done'